Ranking of Iowa Counties By Percentage of Population with Cajun Ancestry in 2021

Updated on April 16, 2025.

Based on the US Census ACS-5Yrs estimates, in 2021, there were 100 people in Iowa with Cajun ancestry (0.003% of Iowa population). Among all Iowa counties, Lucas County had the highest percentage of its population with Cajun ancestry (0.09%), followed by O'Brien County (0.08%), and Grundy County (0.07%).

The chart and table below shows the top 10 counties with high percentage of its population having Cajun ancestry.

You can see similar information for other states and for other ancestry groups in Iowa.

Data Source: US Census Bureau.
Ranking of Iowa Counties By Percentage of Population with Cajun Ancestry in 2021
Lucas County
O'Brien County
Grundy County
Ida County
Clay County
Lee County
Marshall County
Black Hawk County
Pottawattamie County
Woodbury County
Ranking of Iowa Counties By Percentage of Population with Cajun Ancestry in 2021
0 of 0
Rank County Percentage of Pop. (%)
1 Lucas County 0.09
2 O'Brien County 0.08
3 Grundy County 0.07
3 Ida County 0.07
4 Clay County 0.06
5 Lee County 0.03
6 Marshall County 0.02
7 Black Hawk County 0.01
7 Pottawattamie County 0.01
7 Woodbury County 0.01
8 Polk County 0.004